Home / 9,009.28-12,427.62-5,421.74

Finding the Fourth Proportional to 9,009.28, 12,427.62 and 5,421.74

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Solution

The fourth proportional to 9,009.28, 12,427.62 and 5,421.74 is: 7,478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,009.28 : 12,427.62 = 5,421.74 : x
  2. Step 2: Convert to fraction form
    9,009.28/12,427.62 = 5,421.74/x
  3. Step 3: Cross multiply
    9,009.28x = 12,427.62 × 5,421.74
  4. Step 4: Simplify right side
    9,009.28x = 67,379,324.46
  5. Step 5: Solve for x
    x = 67,379,324.46/9,009.28
  6. Step 6: Final answer
    x = 7,478.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.